Eppa
abbr. 4-ethoxy-2-hydroxyphenyl propionic acid 4-乙氧基-2-羟苯基丙酸（科技符号）
🗣️ 情景例句
What guarantee do I have that it won't break down easily?
有什么保障它不会轻易出故障？
How often do you eat out?
你隔多久在外面吃一次饭？
Last year, however, it came into use.
然而去年机场开始使用了。